High-pressure compressor



.lilly 1, .1930.

c. scHAER HIGH PRESSURE COMPRESSOR Filed Jan. 2o, 1928 2 sheets-sheet 1:T Il

HNETD July 1, 1930. c. scHAER 1,768,791

HIGH PRESSURE COMPRESSOR Filed Jan. 2o, 1928 -2 sheets-Sheet i4 F. i5

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Patented July 1, 1939 NTl ori-*fica CHARLES semina, oF LANGENTHAL,swrrrznRLAnn; AssIeNoia To THE FIRM or SULZER FRERES SOCIETE ANONYME OFWINTERTHUR, SWITZERLAND HIGH-PRESSURE coiurnnssen Appncation ineaJanuary 2o, 192s, serial No. 248,121, 'airain switzerland February 24,1927.

This invention relates to high pressure piston or reciprocatingcompressors or the like of the kind in which the driving apparatusdrives the compressor through the medium of an oscillating column ofliquid. The object of the invention is to provide means which willfacilitate the removal of the pistons and increase the strength of thepiston rod.

According to this invention one or more flexible couplings or clutchesare provided' between the piston of the compressor and the drivingpiston, thus'not only facilitating the removal kof the pistons but also'reducing the bending length of the piston rod.

The coupling is preferably mounted in a pivotal and not rigid manner andin a convenient construction one end of the piston red whichl is dividedinto two parts is of spherical shape to engage a correspondingly shapedsocket on the other part of the rod. v

|Ihe connection may be such that the two parts of the piston rod canrotate or turn relatively to one another and can also move The inventionis particularly applicable to the driving pistons of compressors exposedon both sides to the action of a liquid column.

The invention is illustrated by way of example in the accompanyingdrawing, in which:

Figure 1 shows the application of the invention to a compressor of thetype above referred to, and

Figure 2 is a sectional elevation on an enlarged scale, taken on theline 1-1 of Figure 1.

In the compressor shown, the primary piston 5 of the driving machine,connected to the crosshead 3 by the piston rod 4, is actuated by thecrank 1 and connecting rod 2. The compressor pistons 6, 7 and 8 areactuated by the liquid column enclosed between the piston 5 of thedriving machine and the intermediate pistons, 9, 10 and 11.

According to the presentv invention a coupling 12 (shown in detail inFigure 2:) is provided between the pistons 6 and 9; 7 and 10; and 8 and11. p

From ,Figure 2 it will be seen that the pispart v14 of the piston rodhas a spherical end 18 which engages ywith a correspondingly shapedsocket 19 Vmounted'to slideon the Jface y2O ofthe lowerv part 13 ofthepiston rod. I

1Engaging a groove 22 in the vrod 14 is a two-part ring 21 over which isfitted a ring 23 having its upper surface 24 formed spherical. Onthisspherical surfacebears a spherical socket 25 which can move laterally inthe flange 26 which surrounds it. i

The lower part 13 of the piston rodpis provided-in a similar manner witha groove 27 into which is fitted a two-part ring 28. Over the ring 28 isplaced a flange 29 which connects together the parts 13 and 14 of thepiston rod by being bolted at 30 to theiiange 26.

Lubricant is supplied tothe coupling 12 through ay passage 31 in thelower rod, the chamber 34 between langes 26 and 29 being thus placed incommunication with the chamber 32 containing the oscillating liquidcolumn. The lubricant is forced under the spherical socket 19 whence itpasses into the chamber 34.

The invention enables an undivided packing ring to be used in the spacek33 as it is only necessary-when this packing needs attention todisconnect the coupling 12 and to move the' lower part of the piston roddownwards. In spite of the fact that the distance separating the pistons6, 7 and 8 from the pistons 9, 10, 11 is increased by the use of acoupling, the bending length of the piston rod is reduced.

The upper part 14 of the piston rod can slide in the coupling as thesocket is movable and it can also rotate relatively to the lower rod13.0wing to the spherical joint. As .a result the piston rod is onlyexposed to central strains.

I claim:

1. In a high pressure reciprocating com` presser, the combination with aprimary piston effecting a positive movement, a compresser piston and anoscillating column oi? the two overlappingV liquid disposed between saidpistons to transmit power from said primary piston to said compressorpiston, of an intermediate piston arranged between the compressor pistonand the liquid column, and a coupling interposed between the compressorpiston and the ntermediate piston.

2. In a high pressure reciprocating compressor, the combination with aprimary piston eecting a positive movement, a compressor iston and anoscillating column of liquid 'sposed between said pistons to transmitpower from said primary piston to said compressor piston, of aninterme-` diate piston arranged between the compressor piston and theliquid column,

and a, couplnginterposed between the compressor piston and theintermediate iston, said coupling comprising a spherlcal portion of onepart of the compressor piston rod and a; correspondingly shaped socketon another part of the compressor piston rod, whereby the two parts ofthe compressor piston rod can be relatively turned and moved out ofaxial alignment with one another.

In testimony whereof I have aixed my signature. n

CHARLES SCHAER.

